SSL certificates are not being stored, even if user selects "forever"

[samontab]

1) The release of Ubuntu you are using, via 'lsb_release -rd' or System -> About Ubuntu

Description: Ubuntu 16.04.2 LTS
Release: 16.04

2) The version of the package you are using, via 'apt-cache policy pkgname' or by checking in Software Center

konversation:
  Installed: 1.6-0ubuntu1
  Candidate: 1.6-0ubuntu1
  Version table:
 *** 1.6-0ubuntu1 500
        500 http://au.archive.ubuntu.com/ubuntu xenial/universe amd64 Packages
        100 /var/lib/dpkg/status

3) What you expected to happen

When connecting to a server that fails the authenticity check, this is presented:
The SSL certificate for the server SERVERNAME (port PORTNAME) failed the authenticity check

Then, a dialog is presented to see if the user wants to store this certificate just for this session or forever. If the user selects forever, the dialog should not appear again when connecting another time.

4) What happened instead

After selecting forever, the dialog still keeps appearing every time.

Workaround:

It seems that kleopatra is needed for konversation to manage certificates, but it's not being installed by the package manager. The problem is solved by installing it manually with:

sudo apt-get install kleopatra

This package should be added to the dependencies.